Gee-up!

and Gee-woo! addressed to horses both mean “Horse, get
on.” Gee = horse. In Notts and many other counties nurses say to young
children, “Come and see the gee-gees.” There is not the least
likelihood that Gee-woo is the Italian gio, because gio
will not fit in with any of the other terms, and it is absurd to
suppose our peasants would go to Italy for such a word. Woa! or Woo! (q.v.), meaning stop, or halt, is quite another word. We subjoin the
following quotation, although we differ from it. (See Come
Ather.)